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@@ -0,0 +1,1186 @@
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+/* eslint-disable */
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+// https://www.npmjs.com/package/css-layout
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+// change: module export strategy. Use ES6 Module
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+
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+/**
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+ * Copyright (c) 2014, Facebook, Inc.
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+ * All rights reserved.
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+ *
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+ * This source code is licensed under the BSD-style license found in the
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+ * LICENSE file in the root directory of this source tree. An additional grant
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+ * of patent rights can be found in the PATENTS file in the same directory.
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+ */
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+
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+var computeLayout = (function() {
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+
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+ var CSS_UNDEFINED;
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+
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+ var CSS_DIRECTION_INHERIT = 'inherit';
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+ var CSS_DIRECTION_LTR = 'ltr';
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+ var CSS_DIRECTION_RTL = 'rtl';
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+
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+ var CSS_FLEX_DIRECTION_ROW = 'row';
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+ var CSS_FLEX_DIRECTION_ROW_REVERSE = 'row-reverse';
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+ var CSS_FLEX_DIRECTION_COLUMN = 'column';
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+ var CSS_FLEX_DIRECTION_COLUMN_REVERSE = 'column-reverse';
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+
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+ var CSS_JUSTIFY_FLEX_START = 'flex-start';
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+ var CSS_JUSTIFY_CENTER = 'center';
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+ var CSS_JUSTIFY_FLEX_END = 'flex-end';
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+ var CSS_JUSTIFY_SPACE_BETWEEN = 'space-between';
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+ var CSS_JUSTIFY_SPACE_AROUND = 'space-around';
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+
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+ var CSS_ALIGN_FLEX_START = 'flex-start';
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+ var CSS_ALIGN_CENTER = 'center';
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+ var CSS_ALIGN_FLEX_END = 'flex-end';
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+ var CSS_ALIGN_STRETCH = 'stretch';
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+
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+ var CSS_POSITION_RELATIVE = 'relative';
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+ var CSS_POSITION_ABSOLUTE = 'absolute';
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+
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+ var leading = {
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+ 'row': 'left',
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+ 'row-reverse': 'right',
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+ 'column': 'top',
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+ 'column-reverse': 'bottom'
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+ };
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+ var trailing = {
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+ 'row': 'right',
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+ 'row-reverse': 'left',
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+ 'column': 'bottom',
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+ 'column-reverse': 'top'
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+ };
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+ var pos = {
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+ 'row': 'left',
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+ 'row-reverse': 'right',
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+ 'column': 'top',
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+ 'column-reverse': 'bottom'
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+ };
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+ var dim = {
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+ 'row': 'width',
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+ 'row-reverse': 'width',
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+ 'column': 'height',
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+ 'column-reverse': 'height'
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+ };
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+
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+ // When transpiled to Java / C the node type has layout, children and style
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+ // properties. For the JavaScript version this function adds these properties
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+ // if they don't already exist.
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+ function fillNodes(node) {
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+ if (!node.layout || node.isDirty) {
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+ node.layout = {
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+ width: undefined,
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+ height: undefined,
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+ top: 0,
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+ left: 0,
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+ right: 0,
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+ bottom: 0
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+ };
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+ }
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+
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+ if (!node.style) {
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+ node.style = {};
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+ }
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+
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+ if (!node.children) {
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+ node.children = [];
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+ }
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+ node.children.forEach(fillNodes);
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+ return node;
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+ }
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+
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+ function isUndefined(value) {
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+ return value === undefined;
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+ }
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+
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+ function isRowDirection(flexDirection) {
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+ return flexDirection === CSS_FLEX_DIRECTION_ROW ||
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+ flexDirection === CSS_FLEX_DIRECTION_ROW_REVERSE;
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+ }
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+
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+ function isColumnDirection(flexDirection) {
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+ return flexDirection === CSS_FLEX_DIRECTION_COLUMN ||
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+ flexDirection === CSS_FLEX_DIRECTION_COLUMN_REVERSE;
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+ }
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+
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+ function getLeadingMargin(node, axis) {
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+ if (node.style.marginStart !== undefined && isRowDirection(axis)) {
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+ return node.style.marginStart;
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+ }
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+
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+ var value = null;
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+ switch (axis) {
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+ case 'row': value = node.style.marginLeft; break;
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+ case 'row-reverse': value = node.style.marginRight; break;
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+ case 'column': value = node.style.marginTop; break;
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+ case 'column-reverse': value = node.style.marginBottom; break;
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+ }
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+
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+ if (value !== undefined) {
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+ return value;
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+ }
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+
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+ if (node.style.margin !== undefined) {
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+ return node.style.margin;
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+ }
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+
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+ return 0;
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+ }
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+
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+ function getTrailingMargin(node, axis) {
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+ if (node.style.marginEnd !== undefined && isRowDirection(axis)) {
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+ return node.style.marginEnd;
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+ }
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+
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+ var value = null;
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+ switch (axis) {
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+ case 'row': value = node.style.marginRight; break;
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+ case 'row-reverse': value = node.style.marginLeft; break;
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+ case 'column': value = node.style.marginBottom; break;
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+ case 'column-reverse': value = node.style.marginTop; break;
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+ }
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+
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+ if (value != null) {
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+ return value;
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+ }
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+
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+ if (node.style.margin !== undefined) {
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+ return node.style.margin;
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+ }
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+
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+ return 0;
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+ }
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+
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+ function getLeadingPadding(node, axis) {
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+ if (node.style.paddingStart !== undefined && node.style.paddingStart >= 0
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+ && isRowDirection(axis)) {
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+ return node.style.paddingStart;
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+ }
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+
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+ var value = null;
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+ switch (axis) {
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+ case 'row': value = node.style.paddingLeft; break;
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+ case 'row-reverse': value = node.style.paddingRight; break;
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+ case 'column': value = node.style.paddingTop; break;
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+ case 'column-reverse': value = node.style.paddingBottom; break;
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+ }
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+
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+ if (value != null && value >= 0) {
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+ return value;
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+ }
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+
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+ if (node.style.padding !== undefined && node.style.padding >= 0) {
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+ return node.style.padding;
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+ }
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+
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+ return 0;
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+ }
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+
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+ function getTrailingPadding(node, axis) {
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+ if (node.style.paddingEnd !== undefined && node.style.paddingEnd >= 0
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+ && isRowDirection(axis)) {
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+ return node.style.paddingEnd;
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+ }
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+
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+ var value = null;
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+ switch (axis) {
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+ case 'row': value = node.style.paddingRight; break;
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+ case 'row-reverse': value = node.style.paddingLeft; break;
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+ case 'column': value = node.style.paddingBottom; break;
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+ case 'column-reverse': value = node.style.paddingTop; break;
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+ }
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+
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+ if (value != null && value >= 0) {
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+ return value;
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+ }
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+
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+ if (node.style.padding !== undefined && node.style.padding >= 0) {
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+ return node.style.padding;
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+ }
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+
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+ return 0;
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+ }
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+
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+ function getLeadingBorder(node, axis) {
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+ if (node.style.borderStartWidth !== undefined && node.style.borderStartWidth >= 0
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+ && isRowDirection(axis)) {
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+ return node.style.borderStartWidth;
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+ }
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+
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+ var value = null;
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+ switch (axis) {
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+ case 'row': value = node.style.borderLeftWidth; break;
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+ case 'row-reverse': value = node.style.borderRightWidth; break;
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+ case 'column': value = node.style.borderTopWidth; break;
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+ case 'column-reverse': value = node.style.borderBottomWidth; break;
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+ }
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+
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+ if (value != null && value >= 0) {
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+ return value;
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+ }
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+
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+ if (node.style.borderWidth !== undefined && node.style.borderWidth >= 0) {
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+ return node.style.borderWidth;
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+ }
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+
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+ return 0;
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+ }
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+
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+ function getTrailingBorder(node, axis) {
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+ if (node.style.borderEndWidth !== undefined && node.style.borderEndWidth >= 0
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+ && isRowDirection(axis)) {
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+ return node.style.borderEndWidth;
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+ }
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+
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+ var value = null;
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+ switch (axis) {
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+ case 'row': value = node.style.borderRightWidth; break;
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+ case 'row-reverse': value = node.style.borderLeftWidth; break;
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+ case 'column': value = node.style.borderBottomWidth; break;
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+ case 'column-reverse': value = node.style.borderTopWidth; break;
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+ }
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+
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+ if (value != null && value >= 0) {
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+ return value;
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+ }
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+
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+ if (node.style.borderWidth !== undefined && node.style.borderWidth >= 0) {
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+ return node.style.borderWidth;
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+ }
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+
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+ return 0;
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+ }
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+
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+ function getLeadingPaddingAndBorder(node, axis) {
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+ return getLeadingPadding(node, axis) + getLeadingBorder(node, axis);
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+ }
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+
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+ function getTrailingPaddingAndBorder(node, axis) {
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+ return getTrailingPadding(node, axis) + getTrailingBorder(node, axis);
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+ }
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+
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+ function getBorderAxis(node, axis) {
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+ return getLeadingBorder(node, axis) + getTrailingBorder(node, axis);
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+ }
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+
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+ function getMarginAxis(node, axis) {
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+ return getLeadingMargin(node, axis) + getTrailingMargin(node, axis);
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+ }
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+
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+ function getPaddingAndBorderAxis(node, axis) {
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+ return getLeadingPaddingAndBorder(node, axis) +
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+ getTrailingPaddingAndBorder(node, axis);
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+ }
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+
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+ function getJustifyContent(node) {
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+ if (node.style.justifyContent) {
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+ return node.style.justifyContent;
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+ }
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+ return 'flex-start';
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+ }
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+
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+ function getAlignContent(node) {
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+ if (node.style.alignContent) {
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+ return node.style.alignContent;
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+ }
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+ return 'flex-start';
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+ }
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+
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+ function getAlignItem(node, child) {
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+ if (child.style.alignSelf) {
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+ return child.style.alignSelf;
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+ }
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+ if (node.style.alignItems) {
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+ return node.style.alignItems;
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+ }
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+ return 'stretch';
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+ }
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+
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+ function resolveAxis(axis, direction) {
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+ if (direction === CSS_DIRECTION_RTL) {
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+ if (axis === CSS_FLEX_DIRECTION_ROW) {
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+ return CSS_FLEX_DIRECTION_ROW_REVERSE;
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+ } else if (axis === CSS_FLEX_DIRECTION_ROW_REVERSE) {
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+ return CSS_FLEX_DIRECTION_ROW;
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+ }
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+ }
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+
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+ return axis;
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+ }
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+
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+ function resolveDirection(node, parentDirection) {
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+ var direction;
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+ if (node.style.direction) {
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+ direction = node.style.direction;
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+ } else {
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+ direction = CSS_DIRECTION_INHERIT;
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+ }
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+
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+ if (direction === CSS_DIRECTION_INHERIT) {
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+ direction = (parentDirection === undefined ? CSS_DIRECTION_LTR : parentDirection);
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+ }
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+
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+ return direction;
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+ }
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+
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+ function getFlexDirection(node) {
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+ if (node.style.flexDirection) {
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+ return node.style.flexDirection;
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+ }
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+ return CSS_FLEX_DIRECTION_COLUMN;
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+ }
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+
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+ function getCrossFlexDirection(flexDirection, direction) {
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+ if (isColumnDirection(flexDirection)) {
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+ return resolveAxis(CSS_FLEX_DIRECTION_ROW, direction);
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+ } else {
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+ return CSS_FLEX_DIRECTION_COLUMN;
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+ }
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+ }
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+
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+ function getPositionType(node) {
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+ if (node.style.position) {
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+ return node.style.position;
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+ }
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+ return 'relative';
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+ }
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+
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+ function isFlex(node) {
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+ return (
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+ getPositionType(node) === CSS_POSITION_RELATIVE &&
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+ node.style.flex > 0
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+ );
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+ }
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+
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+ function isFlexWrap(node) {
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+ return node.style.flexWrap === 'wrap';
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+ }
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+
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+ function getDimWithMargin(node, axis) {
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+ return node.layout[dim[axis]] + getMarginAxis(node, axis);
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+ }
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+
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+ function isDimDefined(node, axis) {
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+ return node.style[dim[axis]] !== undefined && node.style[dim[axis]] >= 0;
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+ }
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+
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+ function isPosDefined(node, pos) {
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+ return node.style[pos] !== undefined;
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+ }
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+
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+ function isMeasureDefined(node) {
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+ return node.style.measure !== undefined;
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+ }
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+
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+ function getPosition(node, pos) {
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+ if (node.style[pos] !== undefined) {
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+ return node.style[pos];
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+ }
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+ return 0;
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+ }
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+
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+ function boundAxis(node, axis, value) {
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+ var min = {
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+ 'row': node.style.minWidth,
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+ 'row-reverse': node.style.minWidth,
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+ 'column': node.style.minHeight,
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+ 'column-reverse': node.style.minHeight
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+ }[axis];
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+
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+ var max = {
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+ 'row': node.style.maxWidth,
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+ 'row-reverse': node.style.maxWidth,
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+ 'column': node.style.maxHeight,
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+ 'column-reverse': node.style.maxHeight
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+ }[axis];
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+
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+ var boundValue = value;
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+ if (max !== undefined && max >= 0 && boundValue > max) {
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+ boundValue = max;
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+ }
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+ if (min !== undefined && min >= 0 && boundValue < min) {
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+ boundValue = min;
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+ }
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+ return boundValue;
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+ }
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+
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+ function fmaxf(a, b) {
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+ if (a > b) {
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+ return a;
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+ }
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+ return b;
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+ }
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+
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+ // When the user specifically sets a value for width or height
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+ function setDimensionFromStyle(node, axis) {
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+ // The parent already computed us a width or height. We just skip it
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+ if (node.layout[dim[axis]] !== undefined) {
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+ return;
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+ }
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+ // We only run if there's a width or height defined
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+ if (!isDimDefined(node, axis)) {
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+ return;
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+ }
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+
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+ // The dimensions can never be smaller than the padding and border
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+ node.layout[dim[axis]] = fmaxf(
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+ boundAxis(node, axis, node.style[dim[axis]]),
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+ getPaddingAndBorderAxis(node, axis)
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+ );
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+ }
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+
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+ function setTrailingPosition(node, child, axis) {
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+ child.layout[trailing[axis]] = node.layout[dim[axis]] -
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+ child.layout[dim[axis]] - child.layout[pos[axis]];
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+ }
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+
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|
|
+ // If both left and right are defined, then use left. Otherwise return
|
|
|
+ // +left or -right depending on which is defined.
|
|
|
+ function getRelativePosition(node, axis) {
|
|
|
+ if (node.style[leading[axis]] !== undefined) {
|
|
|
+ return getPosition(node, leading[axis]);
|
|
|
+ }
|
|
|
+ return -getPosition(node, trailing[axis]);
|
|
|
+ }
|
|
|
+
|
|
|
+ function layoutNodeImpl(node, parentMaxWidth, /*css_direction_t*/parentDirection) {
|
|
|
+ var/*css_direction_t*/ direction = resolveDirection(node, parentDirection);
|
|
|
+ var/*(c)!css_flex_direction_t*//*(java)!int*/ mainAxis = resolveAxis(getFlexDirection(node), direction);
|
|
|
+ var/*(c)!css_flex_direction_t*//*(java)!int*/ crossAxis = getCrossFlexDirection(mainAxis, direction);
|
|
|
+ var/*(c)!css_flex_direction_t*//*(java)!int*/ resolvedRowAxis = resolveAxis(CSS_FLEX_DIRECTION_ROW, direction);
|
|
|
+
|
|
|
+ // Handle width and height style attributes
|
|
|
+ setDimensionFromStyle(node, mainAxis);
|
|
|
+ setDimensionFromStyle(node, crossAxis);
|
|
|
+
|
|
|
+ // Set the resolved resolution in the node's layout
|
|
|
+ node.layout.direction = direction;
|
|
|
+
|
|
|
+ // The position is set by the parent, but we need to complete it with a
|
|
|
+ // delta composed of the margin and left/top/right/bottom
|
|
|
+ node.layout[leading[mainAxis]] += getLeadingMargin(node, mainAxis) +
|
|
|
+ getRelativePosition(node, mainAxis);
|
|
|
+ node.layout[trailing[mainAxis]] += getTrailingMargin(node, mainAxis) +
|
|
|
+ getRelativePosition(node, mainAxis);
|
|
|
+ node.layout[leading[crossAxis]] += getLeadingMargin(node, crossAxis) +
|
|
|
+ getRelativePosition(node, crossAxis);
|
|
|
+ node.layout[trailing[crossAxis]] += getTrailingMargin(node, crossAxis) +
|
|
|
+ getRelativePosition(node, crossAxis);
|
|
|
+
|
|
|
+ // Inline immutable values from the target node to avoid excessive method
|
|
|
+ // invocations during the layout calculation.
|
|
|
+ var/*int*/ childCount = node.children.length;
|
|
|
+ var/*float*/ paddingAndBorderAxisResolvedRow = getPaddingAndBorderAxis(node, resolvedRowAxis);
|
|
|
+
|
|
|
+ if (isMeasureDefined(node)) {
|
|
|
+ var/*bool*/ isResolvedRowDimDefined = !isUndefined(node.layout[dim[resolvedRowAxis]]);
|
|
|
+
|
|
|
+ var/*float*/ width = CSS_UNDEFINED;
|
|
|
+ if (isDimDefined(node, resolvedRowAxis)) {
|
|
|
+ width = node.style.width;
|
|
|
+ } else if (isResolvedRowDimDefined) {
|
|
|
+ width = node.layout[dim[resolvedRowAxis]];
|
|
|
+ } else {
|
|
|
+ width = parentMaxWidth -
|
|
|
+ getMarginAxis(node, resolvedRowAxis);
|
|
|
+ }
|
|
|
+ width -= paddingAndBorderAxisResolvedRow;
|
|
|
+
|
|
|
+ // We only need to give a dimension for the text if we haven't got any
|
|
|
+ // for it computed yet. It can either be from the style attribute or because
|
|
|
+ // the element is flexible.
|
|
|
+ var/*bool*/ isRowUndefined = !isDimDefined(node, resolvedRowAxis) && !isResolvedRowDimDefined;
|
|
|
+ var/*bool*/ isColumnUndefined = !isDimDefined(node, CSS_FLEX_DIRECTION_COLUMN) &&
|
|
|
+ isUndefined(node.layout[dim[CSS_FLEX_DIRECTION_COLUMN]]);
|
|
|
+
|
|
|
+ // Let's not measure the text if we already know both dimensions
|
|
|
+ if (isRowUndefined || isColumnUndefined) {
|
|
|
+ var/*css_dim_t*/ measureDim = node.style.measure(
|
|
|
+ /*(c)!node->context,*/
|
|
|
+ /*(java)!layoutContext.measureOutput,*/
|
|
|
+ width
|
|
|
+ );
|
|
|
+ if (isRowUndefined) {
|
|
|
+ node.layout.width = measureDim.width +
|
|
|
+ paddingAndBorderAxisResolvedRow;
|
|
|
+ }
|
|
|
+ if (isColumnUndefined) {
|
|
|
+ node.layout.height = measureDim.height +
|
|
|
+ getPaddingAndBorderAxis(node, CSS_FLEX_DIRECTION_COLUMN);
|
|
|
+ }
|
|
|
+ }
|
|
|
+ if (childCount === 0) {
|
|
|
+ return;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ var/*bool*/ isNodeFlexWrap = isFlexWrap(node);
|
|
|
+
|
|
|
+ var/*css_justify_t*/ justifyContent = getJustifyContent(node);
|
|
|
+
|
|
|
+ var/*float*/ leadingPaddingAndBorderMain = getLeadingPaddingAndBorder(node, mainAxis);
|
|
|
+ var/*float*/ leadingPaddingAndBorderCross = getLeadingPaddingAndBorder(node, crossAxis);
|
|
|
+ var/*float*/ paddingAndBorderAxisMain = getPaddingAndBorderAxis(node, mainAxis);
|
|
|
+ var/*float*/ paddingAndBorderAxisCross = getPaddingAndBorderAxis(node, crossAxis);
|
|
|
+
|
|
|
+ var/*bool*/ isMainDimDefined = !isUndefined(node.layout[dim[mainAxis]]);
|
|
|
+ var/*bool*/ isCrossDimDefined = !isUndefined(node.layout[dim[crossAxis]]);
|
|
|
+ var/*bool*/ isMainRowDirection = isRowDirection(mainAxis);
|
|
|
+
|
|
|
+ var/*int*/ i;
|
|
|
+ var/*int*/ ii;
|
|
|
+ var/*css_node_t**/ child;
|
|
|
+ var/*(c)!css_flex_direction_t*//*(java)!int*/ axis;
|
|
|
+
|
|
|
+ var/*css_node_t**/ firstAbsoluteChild = null;
|
|
|
+ var/*css_node_t**/ currentAbsoluteChild = null;
|
|
|
+
|
|
|
+ var/*float*/ definedMainDim = CSS_UNDEFINED;
|
|
|
+ if (isMainDimDefined) {
|
|
|
+ definedMainDim = node.layout[dim[mainAxis]] - paddingAndBorderAxisMain;
|
|
|
+ }
|
|
|
+
|
|
|
+ // We want to execute the next two loops one per line with flex-wrap
|
|
|
+ var/*int*/ startLine = 0;
|
|
|
+ var/*int*/ endLine = 0;
|
|
|
+ // var/*int*/ nextOffset = 0;
|
|
|
+ var/*int*/ alreadyComputedNextLayout = 0;
|
|
|
+ // We aggregate the total dimensions of the container in those two variables
|
|
|
+ var/*float*/ linesCrossDim = 0;
|
|
|
+ var/*float*/ linesMainDim = 0;
|
|
|
+ var/*int*/ linesCount = 0;
|
|
|
+ while (endLine < childCount) {
|
|
|
+ // <Loop A> Layout non flexible children and count children by type
|
|
|
+
|
|
|
+ // mainContentDim is accumulation of the dimensions and margin of all the
|
|
|
+ // non flexible children. This will be used in order to either set the
|
|
|
+ // dimensions of the node if none already exist, or to compute the
|
|
|
+ // remaining space left for the flexible children.
|
|
|
+ var/*float*/ mainContentDim = 0;
|
|
|
+
|
|
|
+ // There are three kind of children, non flexible, flexible and absolute.
|
|
|
+ // We need to know how many there are in order to distribute the space.
|
|
|
+ var/*int*/ flexibleChildrenCount = 0;
|
|
|
+ var/*float*/ totalFlexible = 0;
|
|
|
+ var/*int*/ nonFlexibleChildrenCount = 0;
|
|
|
+
|
|
|
+ // Use the line loop to position children in the main axis for as long
|
|
|
+ // as they are using a simple stacking behaviour. Children that are
|
|
|
+ // immediately stacked in the initial loop will not be touched again
|
|
|
+ // in <Loop C>.
|
|
|
+ var/*bool*/ isSimpleStackMain =
|
|
|
+ (isMainDimDefined && justifyContent === CSS_JUSTIFY_FLEX_START) ||
|
|
|
+ (!isMainDimDefined && justifyContent !== CSS_JUSTIFY_CENTER);
|
|
|
+ var/*int*/ firstComplexMain = (isSimpleStackMain ? childCount : startLine);
|
|
|
+
|
|
|
+ // Use the initial line loop to position children in the cross axis for
|
|
|
+ // as long as they are relatively positioned with alignment STRETCH or
|
|
|
+ // FLEX_START. Children that are immediately stacked in the initial loop
|
|
|
+ // will not be touched again in <Loop D>.
|
|
|
+ var/*bool*/ isSimpleStackCross = true;
|
|
|
+ var/*int*/ firstComplexCross = childCount;
|
|
|
+
|
|
|
+ var/*css_node_t**/ firstFlexChild = null;
|
|
|
+ var/*css_node_t**/ currentFlexChild = null;
|
|
|
+
|
|
|
+ var/*float*/ mainDim = leadingPaddingAndBorderMain;
|
|
|
+ var/*float*/ crossDim = 0;
|
|
|
+
|
|
|
+ var/*float*/ maxWidth;
|
|
|
+ for (i = startLine; i < childCount; ++i) {
|
|
|
+ child = node.children[i];
|
|
|
+ child.lineIndex = linesCount;
|
|
|
+
|
|
|
+ child.nextAbsoluteChild = null;
|
|
|
+ child.nextFlexChild = null;
|
|
|
+
|
|
|
+ var/*css_align_t*/ alignItem = getAlignItem(node, child);
|
|
|
+
|
|
|
+ // Pre-fill cross axis dimensions when the child is using stretch before
|
|
|
+ // we call the recursive layout pass
|
|
|
+ if (alignItem === CSS_ALIGN_STRETCH &&
|
|
|
+ getPositionType(child) === CSS_POSITION_RELATIVE &&
|
|
|
+ isCrossDimDefined &&
|
|
|
+ !isDimDefined(child, crossAxis)) {
|
|
|
+ child.layout[dim[crossAxis]] = fmaxf(
|
|
|
+ boundAxis(child, crossAxis, node.layout[dim[crossAxis]] -
|
|
|
+ paddingAndBorderAxisCross - getMarginAxis(child, crossAxis)),
|
|
|
+ // You never want to go smaller than padding
|
|
|
+ getPaddingAndBorderAxis(child, crossAxis)
|
|
|
+ );
|
|
|
+ } else if (getPositionType(child) === CSS_POSITION_ABSOLUTE) {
|
|
|
+ // Store a private linked list of absolutely positioned children
|
|
|
+ // so that we can efficiently traverse them later.
|
|
|
+ if (firstAbsoluteChild === null) {
|
|
|
+ firstAbsoluteChild = child;
|
|
|
+ }
|
|
|
+ if (currentAbsoluteChild !== null) {
|
|
|
+ currentAbsoluteChild.nextAbsoluteChild = child;
|
|
|
+ }
|
|
|
+ currentAbsoluteChild = child;
|
|
|
+
|
|
|
+ // Pre-fill dimensions when using absolute position and both offsets for the axis are defined (either both
|
|
|
+ // left and right or top and bottom).
|
|
|
+ for (ii = 0; ii < 2; ii++) {
|
|
|
+ axis = (ii !== 0) ? CSS_FLEX_DIRECTION_ROW : CSS_FLEX_DIRECTION_COLUMN;
|
|
|
+ if (!isUndefined(node.layout[dim[axis]]) &&
|
|
|
+ !isDimDefined(child, axis) &&
|
|
|
+ isPosDefined(child, leading[axis]) &&
|
|
|
+ isPosDefined(child, trailing[axis])) {
|
|
|
+ child.layout[dim[axis]] = fmaxf(
|
|
|
+ boundAxis(child, axis, node.layout[dim[axis]] -
|
|
|
+ getPaddingAndBorderAxis(node, axis) -
|
|
|
+ getMarginAxis(child, axis) -
|
|
|
+ getPosition(child, leading[axis]) -
|
|
|
+ getPosition(child, trailing[axis])),
|
|
|
+ // You never want to go smaller than padding
|
|
|
+ getPaddingAndBorderAxis(child, axis)
|
|
|
+ );
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ var/*float*/ nextContentDim = 0;
|
|
|
+
|
|
|
+ // It only makes sense to consider a child flexible if we have a computed
|
|
|
+ // dimension for the node.
|
|
|
+ if (isMainDimDefined && isFlex(child)) {
|
|
|
+ flexibleChildrenCount++;
|
|
|
+ totalFlexible += child.style.flex;
|
|
|
+
|
|
|
+ // Store a private linked list of flexible children so that we can
|
|
|
+ // efficiently traverse them later.
|
|
|
+ if (firstFlexChild === null) {
|
|
|
+ firstFlexChild = child;
|
|
|
+ }
|
|
|
+ if (currentFlexChild !== null) {
|
|
|
+ currentFlexChild.nextFlexChild = child;
|
|
|
+ }
|
|
|
+ currentFlexChild = child;
|
|
|
+
|
|
|
+ // Even if we don't know its exact size yet, we already know the padding,
|
|
|
+ // border and margin. We'll use this partial information, which represents
|
|
|
+ // the smallest possible size for the child, to compute the remaining
|
|
|
+ // available space.
|
|
|
+ nextContentDim = getPaddingAndBorderAxis(child, mainAxis) +
|
|
|
+ getMarginAxis(child, mainAxis);
|
|
|
+
|
|
|
+ } else {
|
|
|
+ maxWidth = CSS_UNDEFINED;
|
|
|
+ if (!isMainRowDirection) {
|
|
|
+ if (isDimDefined(node, resolvedRowAxis)) {
|
|
|
+ maxWidth = node.layout[dim[resolvedRowAxis]] -
|
|
|
+ paddingAndBorderAxisResolvedRow;
|
|
|
+ } else {
|
|
|
+ maxWidth = parentMaxWidth -
|
|
|
+ getMarginAxis(node, resolvedRowAxis) -
|
|
|
+ paddingAndBorderAxisResolvedRow;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ // This is the main recursive call. We layout non flexible children.
|
|
|
+ if (alreadyComputedNextLayout === 0) {
|
|
|
+ layoutNode(/*(java)!layoutContext, */child, maxWidth, direction);
|
|
|
+ }
|
|
|
+
|
|
|
+ // Absolute positioned elements do not take part of the layout, so we
|
|
|
+ // don't use them to compute mainContentDim
|
|
|
+ if (getPositionType(child) === CSS_POSITION_RELATIVE) {
|
|
|
+ nonFlexibleChildrenCount++;
|
|
|
+ // At this point we know the final size and margin of the element.
|
|
|
+ nextContentDim = getDimWithMargin(child, mainAxis);
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ // The element we are about to add would make us go to the next line
|
|
|
+ if (isNodeFlexWrap &&
|
|
|
+ isMainDimDefined &&
|
|
|
+ mainContentDim + nextContentDim > definedMainDim &&
|
|
|
+ // If there's only one element, then it's bigger than the content
|
|
|
+ // and needs its own line
|
|
|
+ i !== startLine) {
|
|
|
+ nonFlexibleChildrenCount--;
|
|
|
+ alreadyComputedNextLayout = 1;
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ // Disable simple stacking in the main axis for the current line as
|
|
|
+ // we found a non-trivial child. The remaining children will be laid out
|
|
|
+ // in <Loop C>.
|
|
|
+ if (isSimpleStackMain &&
|
|
|
+ (getPositionType(child) !== CSS_POSITION_RELATIVE || isFlex(child))) {
|
|
|
+ isSimpleStackMain = false;
|
|
|
+ firstComplexMain = i;
|
|
|
+ }
|
|
|
+
|
|
|
+ // Disable simple stacking in the cross axis for the current line as
|
|
|
+ // we found a non-trivial child. The remaining children will be laid out
|
|
|
+ // in <Loop D>.
|
|
|
+ if (isSimpleStackCross &&
|
|
|
+ (getPositionType(child) !== CSS_POSITION_RELATIVE ||
|
|
|
+ (alignItem !== CSS_ALIGN_STRETCH && alignItem !== CSS_ALIGN_FLEX_START) ||
|
|
|
+ isUndefined(child.layout[dim[crossAxis]]))) {
|
|
|
+ isSimpleStackCross = false;
|
|
|
+ firstComplexCross = i;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (isSimpleStackMain) {
|
|
|
+ child.layout[pos[mainAxis]] += mainDim;
|
|
|
+ if (isMainDimDefined) {
|
|
|
+ setTrailingPosition(node, child, mainAxis);
|
|
|
+ }
|
|
|
+
|
|
|
+ mainDim += getDimWithMargin(child, mainAxis);
|
|
|
+ crossDim = fmaxf(crossDim, boundAxis(child, crossAxis, getDimWithMargin(child, crossAxis)));
|
|
|
+ }
|
|
|
+
|
|
|
+ if (isSimpleStackCross) {
|
|
|
+ child.layout[pos[crossAxis]] += linesCrossDim + leadingPaddingAndBorderCross;
|
|
|
+ if (isCrossDimDefined) {
|
|
|
+ setTrailingPosition(node, child, crossAxis);
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ alreadyComputedNextLayout = 0;
|
|
|
+ mainContentDim += nextContentDim;
|
|
|
+ endLine = i + 1;
|
|
|
+ }
|
|
|
+
|
|
|
+ // <Loop B> Layout flexible children and allocate empty space
|
|
|
+
|
|
|
+ // In order to position the elements in the main axis, we have two
|
|
|
+ // controls. The space between the beginning and the first element
|
|
|
+ // and the space between each two elements.
|
|
|
+ var/*float*/ leadingMainDim = 0;
|
|
|
+ var/*float*/ betweenMainDim = 0;
|
|
|
+
|
|
|
+ // The remaining available space that needs to be allocated
|
|
|
+ var/*float*/ remainingMainDim = 0;
|
|
|
+ if (isMainDimDefined) {
|
|
|
+ remainingMainDim = definedMainDim - mainContentDim;
|
|
|
+ } else {
|
|
|
+ remainingMainDim = fmaxf(mainContentDim, 0) - mainContentDim;
|
|
|
+ }
|
|
|
+
|
|
|
+ // If there are flexible children in the mix, they are going to fill the
|
|
|
+ // remaining space
|
|
|
+ if (flexibleChildrenCount !== 0) {
|
|
|
+ var/*float*/ flexibleMainDim = remainingMainDim / totalFlexible;
|
|
|
+ var/*float*/ baseMainDim;
|
|
|
+ var/*float*/ boundMainDim;
|
|
|
+
|
|
|
+ // If the flex share of remaining space doesn't meet min/max bounds,
|
|
|
+ // remove this child from flex calculations.
|
|
|
+ currentFlexChild = firstFlexChild;
|
|
|
+ while (currentFlexChild !== null) {
|
|
|
+ baseMainDim = flexibleMainDim * currentFlexChild.style.flex +
|
|
|
+ getPaddingAndBorderAxis(currentFlexChild, mainAxis);
|
|
|
+ boundMainDim = boundAxis(currentFlexChild, mainAxis, baseMainDim);
|
|
|
+
|
|
|
+ if (baseMainDim !== boundMainDim) {
|
|
|
+ remainingMainDim -= boundMainDim;
|
|
|
+ totalFlexible -= currentFlexChild.style.flex;
|
|
|
+ }
|
|
|
+
|
|
|
+ currentFlexChild = currentFlexChild.nextFlexChild;
|
|
|
+ }
|
|
|
+ flexibleMainDim = remainingMainDim / totalFlexible;
|
|
|
+
|
|
|
+ // The non flexible children can overflow the container, in this case
|
|
|
+ // we should just assume that there is no space available.
|
|
|
+ if (flexibleMainDim < 0) {
|
|
|
+ flexibleMainDim = 0;
|
|
|
+ }
|
|
|
+
|
|
|
+ currentFlexChild = firstFlexChild;
|
|
|
+ while (currentFlexChild !== null) {
|
|
|
+ // At this point we know the final size of the element in the main
|
|
|
+ // dimension
|
|
|
+ currentFlexChild.layout[dim[mainAxis]] = boundAxis(currentFlexChild, mainAxis,
|
|
|
+ flexibleMainDim * currentFlexChild.style.flex +
|
|
|
+ getPaddingAndBorderAxis(currentFlexChild, mainAxis)
|
|
|
+ );
|
|
|
+
|
|
|
+ maxWidth = CSS_UNDEFINED;
|
|
|
+ if (isDimDefined(node, resolvedRowAxis)) {
|
|
|
+ maxWidth = node.layout[dim[resolvedRowAxis]] -
|
|
|
+ paddingAndBorderAxisResolvedRow;
|
|
|
+ } else if (!isMainRowDirection) {
|
|
|
+ maxWidth = parentMaxWidth -
|
|
|
+ getMarginAxis(node, resolvedRowAxis) -
|
|
|
+ paddingAndBorderAxisResolvedRow;
|
|
|
+ }
|
|
|
+
|
|
|
+ // And we recursively call the layout algorithm for this child
|
|
|
+ layoutNode(/*(java)!layoutContext, */currentFlexChild, maxWidth, direction);
|
|
|
+
|
|
|
+ child = currentFlexChild;
|
|
|
+ currentFlexChild = currentFlexChild.nextFlexChild;
|
|
|
+ child.nextFlexChild = null;
|
|
|
+ }
|
|
|
+
|
|
|
+ // We use justifyContent to figure out how to allocate the remaining
|
|
|
+ // space available
|
|
|
+ } else if (justifyContent !== CSS_JUSTIFY_FLEX_START) {
|
|
|
+ if (justifyContent === CSS_JUSTIFY_CENTER) {
|
|
|
+ leadingMainDim = remainingMainDim / 2;
|
|
|
+ } else if (justifyContent === CSS_JUSTIFY_FLEX_END) {
|
|
|
+ leadingMainDim = remainingMainDim;
|
|
|
+ } else if (justifyContent === CSS_JUSTIFY_SPACE_BETWEEN) {
|
|
|
+ remainingMainDim = fmaxf(remainingMainDim, 0);
|
|
|
+ if (flexibleChildrenCount + nonFlexibleChildrenCount - 1 !== 0) {
|
|
|
+ betweenMainDim = remainingMainDim /
|
|
|
+ (flexibleChildrenCount + nonFlexibleChildrenCount - 1);
|
|
|
+ } else {
|
|
|
+ betweenMainDim = 0;
|
|
|
+ }
|
|
|
+ } else if (justifyContent === CSS_JUSTIFY_SPACE_AROUND) {
|
|
|
+ // Space on the edges is half of the space between elements
|
|
|
+ betweenMainDim = remainingMainDim /
|
|
|
+ (flexibleChildrenCount + nonFlexibleChildrenCount);
|
|
|
+ leadingMainDim = betweenMainDim / 2;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ // <Loop C> Position elements in the main axis and compute dimensions
|
|
|
+
|
|
|
+ // At this point, all the children have their dimensions set. We need to
|
|
|
+ // find their position. In order to do that, we accumulate data in
|
|
|
+ // variables that are also useful to compute the total dimensions of the
|
|
|
+ // container!
|
|
|
+ mainDim += leadingMainDim;
|
|
|
+
|
|
|
+ for (i = firstComplexMain; i < endLine; ++i) {
|
|
|
+ child = node.children[i];
|
|
|
+
|
|
|
+ if (getPositionType(child) === CSS_POSITION_ABSOLUTE &&
|
|
|
+ isPosDefined(child, leading[mainAxis])) {
|
|
|
+ // In case the child is position absolute and has left/top being
|
|
|
+ // defined, we override the position to whatever the user said
|
|
|
+ // (and margin/border).
|
|
|
+ child.layout[pos[mainAxis]] = getPosition(child, leading[mainAxis]) +
|
|
|
+ getLeadingBorder(node, mainAxis) +
|
|
|
+ getLeadingMargin(child, mainAxis);
|
|
|
+ } else {
|
|
|
+ // If the child is position absolute (without top/left) or relative,
|
|
|
+ // we put it at the current accumulated offset.
|
|
|
+ child.layout[pos[mainAxis]] += mainDim;
|
|
|
+
|
|
|
+ // Define the trailing position accordingly.
|
|
|
+ if (isMainDimDefined) {
|
|
|
+ setTrailingPosition(node, child, mainAxis);
|
|
|
+ }
|
|
|
+
|
|
|
+ // Now that we placed the element, we need to update the variables
|
|
|
+ // We only need to do that for relative elements. Absolute elements
|
|
|
+ // do not take part in that phase.
|
|
|
+ if (getPositionType(child) === CSS_POSITION_RELATIVE) {
|
|
|
+ // The main dimension is the sum of all the elements dimension plus
|
|
|
+ // the spacing.
|
|
|
+ mainDim += betweenMainDim + getDimWithMargin(child, mainAxis);
|
|
|
+ // The cross dimension is the max of the elements dimension since there
|
|
|
+ // can only be one element in that cross dimension.
|
|
|
+ crossDim = fmaxf(crossDim, boundAxis(child, crossAxis, getDimWithMargin(child, crossAxis)));
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ var/*float*/ containerCrossAxis = node.layout[dim[crossAxis]];
|
|
|
+ if (!isCrossDimDefined) {
|
|
|
+ containerCrossAxis = fmaxf(
|
|
|
+ // For the cross dim, we add both sides at the end because the value
|
|
|
+ // is aggregate via a max function. Intermediate negative values
|
|
|
+ // can mess this computation otherwise
|
|
|
+ boundAxis(node, crossAxis, crossDim + paddingAndBorderAxisCross),
|
|
|
+ paddingAndBorderAxisCross
|
|
|
+ );
|
|
|
+ }
|
|
|
+
|
|
|
+ // <Loop D> Position elements in the cross axis
|
|
|
+ for (i = firstComplexCross; i < endLine; ++i) {
|
|
|
+ child = node.children[i];
|
|
|
+
|
|
|
+ if (getPositionType(child) === CSS_POSITION_ABSOLUTE &&
|
|
|
+ isPosDefined(child, leading[crossAxis])) {
|
|
|
+ // In case the child is absolutely positionned and has a
|
|
|
+ // top/left/bottom/right being set, we override all the previously
|
|
|
+ // computed positions to set it correctly.
|
|
|
+ child.layout[pos[crossAxis]] = getPosition(child, leading[crossAxis]) +
|
|
|
+ getLeadingBorder(node, crossAxis) +
|
|
|
+ getLeadingMargin(child, crossAxis);
|
|
|
+
|
|
|
+ } else {
|
|
|
+ var/*float*/ leadingCrossDim = leadingPaddingAndBorderCross;
|
|
|
+
|
|
|
+ // For a relative children, we're either using alignItems (parent) or
|
|
|
+ // alignSelf (child) in order to determine the position in the cross axis
|
|
|
+ if (getPositionType(child) === CSS_POSITION_RELATIVE) {
|
|
|
+ // This variable is intentionally re-defined as the code is transpiled to a block scope language
|
|
|
+ var/*css_align_t*/ alignItem = getAlignItem(node, child);
|
|
|
+ if (alignItem === CSS_ALIGN_STRETCH) {
|
|
|
+ // You can only stretch if the dimension has not already been set
|
|
|
+ // previously.
|
|
|
+ if (isUndefined(child.layout[dim[crossAxis]])) {
|
|
|
+ child.layout[dim[crossAxis]] = fmaxf(
|
|
|
+ boundAxis(child, crossAxis, containerCrossAxis -
|
|
|
+ paddingAndBorderAxisCross - getMarginAxis(child, crossAxis)),
|
|
|
+ // You never want to go smaller than padding
|
|
|
+ getPaddingAndBorderAxis(child, crossAxis)
|
|
|
+ );
|
|
|
+ }
|
|
|
+ } else if (alignItem !== CSS_ALIGN_FLEX_START) {
|
|
|
+ // The remaining space between the parent dimensions+padding and child
|
|
|
+ // dimensions+margin.
|
|
|
+ var/*float*/ remainingCrossDim = containerCrossAxis -
|
|
|
+ paddingAndBorderAxisCross - getDimWithMargin(child, crossAxis);
|
|
|
+
|
|
|
+ if (alignItem === CSS_ALIGN_CENTER) {
|
|
|
+ leadingCrossDim += remainingCrossDim / 2;
|
|
|
+ } else { // CSS_ALIGN_FLEX_END
|
|
|
+ leadingCrossDim += remainingCrossDim;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ // And we apply the position
|
|
|
+ child.layout[pos[crossAxis]] += linesCrossDim + leadingCrossDim;
|
|
|
+
|
|
|
+ // Define the trailing position accordingly.
|
|
|
+ if (isCrossDimDefined) {
|
|
|
+ setTrailingPosition(node, child, crossAxis);
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ linesCrossDim += crossDim;
|
|
|
+ linesMainDim = fmaxf(linesMainDim, mainDim);
|
|
|
+ linesCount += 1;
|
|
|
+ startLine = endLine;
|
|
|
+ }
|
|
|
+
|
|
|
+ // <Loop E>
|
|
|
+ //
|
|
|
+ // Note(prenaux): More than one line, we need to layout the crossAxis
|
|
|
+ // according to alignContent.
|
|
|
+ //
|
|
|
+ // Note that we could probably remove <Loop D> and handle the one line case
|
|
|
+ // here too, but for the moment this is safer since it won't interfere with
|
|
|
+ // previously working code.
|
|
|
+ //
|
|
|
+ // See specs:
|
|
|
+ // http://www.w3.org/TR/2012/CR-css3-flexbox-20120918/#layout-algorithm
|
|
|
+ // section 9.4
|
|
|
+ //
|
|
|
+ if (linesCount > 1 && isCrossDimDefined) {
|
|
|
+ var/*float*/ nodeCrossAxisInnerSize = node.layout[dim[crossAxis]] -
|
|
|
+ paddingAndBorderAxisCross;
|
|
|
+ var/*float*/ remainingAlignContentDim = nodeCrossAxisInnerSize - linesCrossDim;
|
|
|
+
|
|
|
+ var/*float*/ crossDimLead = 0;
|
|
|
+ var/*float*/ currentLead = leadingPaddingAndBorderCross;
|
|
|
+
|
|
|
+ var/*css_align_t*/ alignContent = getAlignContent(node);
|
|
|
+ if (alignContent === CSS_ALIGN_FLEX_END) {
|
|
|
+ currentLead += remainingAlignContentDim;
|
|
|
+ } else if (alignContent === CSS_ALIGN_CENTER) {
|
|
|
+ currentLead += remainingAlignContentDim / 2;
|
|
|
+ } else if (alignContent === CSS_ALIGN_STRETCH) {
|
|
|
+ if (nodeCrossAxisInnerSize > linesCrossDim) {
|
|
|
+ crossDimLead = (remainingAlignContentDim / linesCount);
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ var/*int*/ endIndex = 0;
|
|
|
+ for (i = 0; i < linesCount; ++i) {
|
|
|
+ var/*int*/ startIndex = endIndex;
|
|
|
+
|
|
|
+ // compute the line's height and find the endIndex
|
|
|
+ var/*float*/ lineHeight = 0;
|
|
|
+ for (ii = startIndex; ii < childCount; ++ii) {
|
|
|
+ child = node.children[ii];
|
|
|
+ if (getPositionType(child) !== CSS_POSITION_RELATIVE) {
|
|
|
+ continue;
|
|
|
+ }
|
|
|
+ if (child.lineIndex !== i) {
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ if (!isUndefined(child.layout[dim[crossAxis]])) {
|
|
|
+ lineHeight = fmaxf(
|
|
|
+ lineHeight,
|
|
|
+ child.layout[dim[crossAxis]] + getMarginAxis(child, crossAxis)
|
|
|
+ );
|
|
|
+ }
|
|
|
+ }
|
|
|
+ endIndex = ii;
|
|
|
+ lineHeight += crossDimLead;
|
|
|
+
|
|
|
+ for (ii = startIndex; ii < endIndex; ++ii) {
|
|
|
+ child = node.children[ii];
|
|
|
+ if (getPositionType(child) !== CSS_POSITION_RELATIVE) {
|
|
|
+ continue;
|
|
|
+ }
|
|
|
+
|
|
|
+ var/*css_align_t*/ alignContentAlignItem = getAlignItem(node, child);
|
|
|
+ if (alignContentAlignItem === CSS_ALIGN_FLEX_START) {
|
|
|
+ child.layout[pos[crossAxis]] = currentLead + getLeadingMargin(child, crossAxis);
|
|
|
+ } else if (alignContentAlignItem === CSS_ALIGN_FLEX_END) {
|
|
|
+ child.layout[pos[crossAxis]] = currentLead + lineHeight - getTrailingMargin(child, crossAxis) - child.layout[dim[crossAxis]];
|
|
|
+ } else if (alignContentAlignItem === CSS_ALIGN_CENTER) {
|
|
|
+ var/*float*/ childHeight = child.layout[dim[crossAxis]];
|
|
|
+ child.layout[pos[crossAxis]] = currentLead + (lineHeight - childHeight) / 2;
|
|
|
+ } else if (alignContentAlignItem === CSS_ALIGN_STRETCH) {
|
|
|
+ child.layout[pos[crossAxis]] = currentLead + getLeadingMargin(child, crossAxis);
|
|
|
+ // TODO(prenaux): Correctly set the height of items with undefined
|
|
|
+ // (auto) crossAxis dimension.
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ currentLead += lineHeight;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ var/*bool*/ needsMainTrailingPos = false;
|
|
|
+ var/*bool*/ needsCrossTrailingPos = false;
|
|
|
+
|
|
|
+ // If the user didn't specify a width or height, and it has not been set
|
|
|
+ // by the container, then we set it via the children.
|
|
|
+ if (!isMainDimDefined) {
|
|
|
+ node.layout[dim[mainAxis]] = fmaxf(
|
|
|
+ // We're missing the last padding at this point to get the final
|
|
|
+ // dimension
|
|
|
+ boundAxis(node, mainAxis, linesMainDim + getTrailingPaddingAndBorder(node, mainAxis)),
|
|
|
+ // We can never assign a width smaller than the padding and borders
|
|
|
+ paddingAndBorderAxisMain
|
|
|
+ );
|
|
|
+
|
|
|
+ if (mainAxis === CSS_FLEX_DIRECTION_ROW_REVERSE ||
|
|
|
+ mainAxis === CSS_FLEX_DIRECTION_COLUMN_REVERSE) {
|
|
|
+ needsMainTrailingPos = true;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ if (!isCrossDimDefined) {
|
|
|
+ node.layout[dim[crossAxis]] = fmaxf(
|
|
|
+ // For the cross dim, we add both sides at the end because the value
|
|
|
+ // is aggregate via a max function. Intermediate negative values
|
|
|
+ // can mess this computation otherwise
|
|
|
+ boundAxis(node, crossAxis, linesCrossDim + paddingAndBorderAxisCross),
|
|
|
+ paddingAndBorderAxisCross
|
|
|
+ );
|
|
|
+
|
|
|
+ if (crossAxis === CSS_FLEX_DIRECTION_ROW_REVERSE ||
|
|
|
+ crossAxis === CSS_FLEX_DIRECTION_COLUMN_REVERSE) {
|
|
|
+ needsCrossTrailingPos = true;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ // <Loop F> Set trailing position if necessary
|
|
|
+ if (needsMainTrailingPos || needsCrossTrailingPos) {
|
|
|
+ for (i = 0; i < childCount; ++i) {
|
|
|
+ child = node.children[i];
|
|
|
+
|
|
|
+ if (needsMainTrailingPos) {
|
|
|
+ setTrailingPosition(node, child, mainAxis);
|
|
|
+ }
|
|
|
+
|
|
|
+ if (needsCrossTrailingPos) {
|
|
|
+ setTrailingPosition(node, child, crossAxis);
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ // <Loop G> Calculate dimensions for absolutely positioned elements
|
|
|
+ currentAbsoluteChild = firstAbsoluteChild;
|
|
|
+ while (currentAbsoluteChild !== null) {
|
|
|
+ // Pre-fill dimensions when using absolute position and both offsets for
|
|
|
+ // the axis are defined (either both left and right or top and bottom).
|
|
|
+ for (ii = 0; ii < 2; ii++) {
|
|
|
+ axis = (ii !== 0) ? CSS_FLEX_DIRECTION_ROW : CSS_FLEX_DIRECTION_COLUMN;
|
|
|
+
|
|
|
+ if (!isUndefined(node.layout[dim[axis]]) &&
|
|
|
+ !isDimDefined(currentAbsoluteChild, axis) &&
|
|
|
+ isPosDefined(currentAbsoluteChild, leading[axis]) &&
|
|
|
+ isPosDefined(currentAbsoluteChild, trailing[axis])) {
|
|
|
+ currentAbsoluteChild.layout[dim[axis]] = fmaxf(
|
|
|
+ boundAxis(currentAbsoluteChild, axis, node.layout[dim[axis]] -
|
|
|
+ getBorderAxis(node, axis) -
|
|
|
+ getMarginAxis(currentAbsoluteChild, axis) -
|
|
|
+ getPosition(currentAbsoluteChild, leading[axis]) -
|
|
|
+ getPosition(currentAbsoluteChild, trailing[axis])
|
|
|
+ ),
|
|
|
+ // You never want to go smaller than padding
|
|
|
+ getPaddingAndBorderAxis(currentAbsoluteChild, axis)
|
|
|
+ );
|
|
|
+ }
|
|
|
+
|
|
|
+ if (isPosDefined(currentAbsoluteChild, trailing[axis]) &&
|
|
|
+ !isPosDefined(currentAbsoluteChild, leading[axis])) {
|
|
|
+ currentAbsoluteChild.layout[leading[axis]] =
|
|
|
+ node.layout[dim[axis]] -
|
|
|
+ currentAbsoluteChild.layout[dim[axis]] -
|
|
|
+ getPosition(currentAbsoluteChild, trailing[axis]);
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ child = currentAbsoluteChild;
|
|
|
+ currentAbsoluteChild = currentAbsoluteChild.nextAbsoluteChild;
|
|
|
+ child.nextAbsoluteChild = null;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ function layoutNode(node, parentMaxWidth, parentDirection) {
|
|
|
+ node.shouldUpdate = true;
|
|
|
+
|
|
|
+ var direction = node.style.direction || CSS_DIRECTION_LTR;
|
|
|
+ var skipLayout =
|
|
|
+ !node.isDirty &&
|
|
|
+ node.lastLayout &&
|
|
|
+ node.lastLayout.requestedHeight === node.layout.height &&
|
|
|
+ node.lastLayout.requestedWidth === node.layout.width &&
|
|
|
+ node.lastLayout.parentMaxWidth === parentMaxWidth &&
|
|
|
+ node.lastLayout.direction === direction;
|
|
|
+
|
|
|
+ if (skipLayout) {
|
|
|
+ node.layout.width = node.lastLayout.width;
|
|
|
+ node.layout.height = node.lastLayout.height;
|
|
|
+ node.layout.top = node.lastLayout.top;
|
|
|
+ node.layout.left = node.lastLayout.left;
|
|
|
+ } else {
|
|
|
+ if (!node.lastLayout) {
|
|
|
+ node.lastLayout = {};
|
|
|
+ }
|
|
|
+
|
|
|
+ node.lastLayout.requestedWidth = node.layout.width;
|
|
|
+ node.lastLayout.requestedHeight = node.layout.height;
|
|
|
+ node.lastLayout.parentMaxWidth = parentMaxWidth;
|
|
|
+ node.lastLayout.direction = direction;
|
|
|
+
|
|
|
+ // Reset child layouts
|
|
|
+ node.children.forEach(function(child) {
|
|
|
+ child.layout.width = undefined;
|
|
|
+ child.layout.height = undefined;
|
|
|
+ child.layout.top = 0;
|
|
|
+ child.layout.left = 0;
|
|
|
+ });
|
|
|
+
|
|
|
+ layoutNodeImpl(node, parentMaxWidth, parentDirection);
|
|
|
+
|
|
|
+ node.lastLayout.width = node.layout.width;
|
|
|
+ node.lastLayout.height = node.layout.height;
|
|
|
+ node.lastLayout.top = node.layout.top;
|
|
|
+ node.lastLayout.left = node.layout.left;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ return {
|
|
|
+ layoutNodeImpl: layoutNodeImpl,
|
|
|
+ computeLayout: layoutNode,
|
|
|
+ fillNodes: fillNodes
|
|
|
+ };
|
|
|
+})();
|
|
|
+
|
|
|
+export default function(node) {
|
|
|
+ // disabling ESLint because this code relies on the above include
|
|
|
+ computeLayout.fillNodes(node);
|
|
|
+ computeLayout.computeLayout(node);
|
|
|
+};
|